INDEX TO THE FIRST VOLUME OF THE TRANSACTIONS OF THE GEOLOGICAL SOCIETY. PAGE AIKIN, ARTHUR, Esq. Observations on theWrekin, and on the Great Coal-field of Shropshire 191 Actynolite, Glassy, globular concretions of/ in the Amygdaloid of • Caer Caradoc 211 Alderley Edge, Account of 40 Alderney, Isle of, Dr. Mac Culloeh's Account of 3 Alluvial Depositions of Ores, Observations on, by Dr. Berger 161 Aluminous Chalybeate Spring, in the Isle of Wight/ Dr. Marcet's Account of 213 ——— . — Index to the Account of 248 Amygdaloid, near Exeter, 101—Variety of, at Caer Caradoc in Shropshire, 210—Culcareo-manganesian, of Upton Pyne in Devonshire, 102—Slaty, between Saltram and Plympton Earle 104 Andalusite, found in the County of Wieklow 275 Argillaceous Breccia, remarkable rocks of, in Jersey 21 Argillaceous Porphyry, Lumps of, stuck in granite 11 Argillaceous Rock on the western side of the Malvern Hills 306 Arseniate of Copper found in Cornwall 26 Arseniate of Iron of Cornwall, Mr. Phillips's Description of 27 Arseniate of Lead found in Cornwall 166 Bardiglione, The Count de Bournon on, 355—Essential specific characters of, 355—Accidental characters of, 358—Table of the varieties of, 359—Observations on the primitive crystal and integrant molecule of, 368—General Observations on, 37%— Remarks on the term, 383^—Table of the modifications of the primitive crystal of, 386—Table of the modification of the pri­ mitive crystal of, according to the determination of the Abbe Hauy 387 Barytes, Sulphate of, in the interior of shells contained in limestone M 1 Baryles, Granular Sulphate of found in the County of Cork 279 Basalt, Columnar, in the Island of Madeira jW>3 BENNETT, THE HON. HENRY GREY, Sketch of the Geology of Madeira 391 41# INDEX/ PAGE BEKGER, J. F. M.D. Observations on the physical Structure of Devonshire and Cornwall 93 * r ' • Sketch of the Geology of some parts of Hamp­ shire and Dorsetshire 249 Beryl, found imbedded in granite, in the County of Wicklow 275 Blue Clay Stratum of the neighbourhood of London, description of, and of the fossil remains it contains 336 Boracic Acid, Native Concrete, Mr. Tennant's Notice respecting 389 BOURNON, THE COUNT DE, Memoir on the Laumonite 77 • Memoir on Bardiglione, or Sulphate of Lime, containing a sketch of a theory of the true nature of Plaster, as well as of its properties, in order to determine the differences that exist between it and Bardiglione 355 Brine Springs in Cheshire, Mr. Holland's Account of 42 Carbonate of Lime, Veins of, intersecting beds of pumice in the Island of Madeira 396 Calcareous Sandstone in the Isle of Wight 257 Chalk, upper stratum of, or flinty, near London, description of the, and of the fossil remains it contains 345 hard, near London, description of, and of the fossil remains it contains 352 Chalk Hills of Hampshire and Dorsetshire, Account pf the 249 Channel Islands, Dr. Mac Culloch's Account of the . 1 Clay and Chalk in the neighbourhood of London, description of the strata interposed between the, and of the fossil remains these strata contain 341 Clay Slatej Transition, of Shropshire 212 Clay Stone of Shropshire 209 Coal-Field of Shropshire, Mr. Aikin's observations on the 191 Coal Formation, the Independent, of Shropshire 194 Coaly Bituminous Matter, found in the cliffs of the south-western coast of the Isle of Wight 254 Cobalt, earthy black ore of, found in the Peninsula of Howth, near Dublin 273 Conglomerate, Quarries of, near Exeter 99 Copper, red Oxyd of, of Cornwall, Mr. Phillips's Description of the 23 Copper Mines in the vicinity of Dublin 270 INDEX, 415 PAGE Cornwall, Dr. Berger's Observations on the physical Structure of, 93—General Observations on the low mountain chain of, 108—General Observations on the mines, of, 156—Table of the heights of different places in 183 Cross Courses in Cornwall, Account of the 165 Dartmoor, Dr. Berger's Account of 117 Devonshire, Dr. Berger's Observations on the physical Structure of, 93—Table of the heights of different places in 185 Diallage, forming, with felspar, a rock near St. Kevern in Cornwall 129 Dorsetshire, Dr. Berger's Sketch of the Geology of some parts of, 249—Table of the heights of some places in 268 Dublin, Dr. Fitton on the Geological Structure of the vicinity of 269 Emery, not found in Guernsey, as it is generally supposed to be 12 Encrinite, a rare variety of 308 Epidote, Compact, found in the Malvern Hills, 290—in Cumber­ land, 292—in the Western Islands, 292—in Guernsey and Jersey, 293—forming one of the component parts of a rock in the Malvern Hills, 290—in Guernsey 293 Felspar, Compact, Bed of, in Shropshire, 209—in the Malvern Hills 300 Felspar Roctis, in Shropshire ' 209 Felspar and Diallage, Rock composed of, in Cornwall^ 129 Ferruginous Sandstone in the Isle of Wight" 253 FITTON, WILLIAM, M.D. Notice respecting the Geological Structure of the vicinity of Dublin, with an account of some rare minerals found in Ireland 269 Flint, Characters of the formation of, in chalk or marl 94 Flint Gravel in loose sand or loam, in the neighbourhood of London, and in Hampshire 251 Fossil Remains contained in the strata near London, Mr. Parkinson's Observations on 324 Gneiss, in the Island of Guernsey, 9—in the Malvern Hills 302 Granite, different situations of, in Cornwall, 109/ 116, 141, 144, 148, 150, 154—in the Malvern Hills, 285, and particular nature of it, 286—Contact of the, with the incumbent rocks in the vicinity of Dublin 271 4113 INDEX. PAGE Granite Veins, in the Isle of Sercq, IS—in Jersey, 21—-in Dart­ moor, 119—at St. Michael's Mount in Cornwall, 143—at Mouse- hole in Cornwall, 144—General Observations on those that traverse the grauwacke formation, 145—traversing granite in the vicinity of Dublin, 271—two of different natures intersect­ ing each other, 271—in the Malvern Hills 289, 299, 302 Granitic Rocks, of Guernsey, 8—of Sercq, 18—of Jersey 20 Granite!, black, in Guernsey 9 Grauwacke, in Sercq, 13—in Jersey 20 Grauwacke Formation, of Devonshire, 101, 105, 118, 121—of Cornwall 109, 113, 116, 122, 127, 131, 144, 151, 156 Great Gossan Lode in Cornwall, Account of 23 Greenstone, in the grauwacke of Cornwall, 115, 122, 128—in Shropshire, 203, 210—in the Malvern Hills 289 Grenatite found in the County of Wicklow 275 Grit, Varieties ofr in Alderney 4—5 Guernsey, Dr. MacCulloch's Account of 7 Gypsum, Difference between Bardiglione and 373 Hampshire, Dr. Berger's Sketch of the Geology of some parts of, 249—Elevation of some places in 268 Heligoland, Dr. Mac Culloch's Notice accompanying a Section of 322 Hematite, Vein of, in the Malvern Hills 301 High gate Hill, fossil remains met with in cutting through a mound of the blue clay stratum at 338 HOLLAND, HENRY, ESQ. Sketch of the Natural History of the Cheshire Rock-Salt District 38 Hollowspar, found in the County of Wicklow 277 Hornblende Rocks of the Malvern Hills 294, 301 Hornblende and Epidote, Rock of 290 HORNER, LEONARD, ESQ, on the Mineralogy of the Malvern Hills 281 Hornstone, the basis of Porphyry in Alderney 7 Jersey, Dr. MacCulloch's Account of 19 Indurated Talc (supposed) in the County of Wicklow 277 Ireland, Dr. Fitton's Account of some rare minerals found in 269 Isle of Wight, Aluminous Chalybeate Spring in the, 213—Eleva­ tion of some places in 268 INDEX. 41f PAGE Kaolin, decomposed granite in the state of, in Cornwall, 125—-on the origin of and where found 126 Kimeridge Coal, Description of 263 Laumonite, The Count de Bournon on the, 77—Specific characters of, 79—Observations on the crystallization of, 82—General Ob­ servations on, 86—Table of the modifications of the primitive crystal of 90 Lava, different varieties of stratified, in the Island of Madeira, 392—• Dykes of, intersecting strata of lava, 394-—Columnar, 395— containing carbonate of lime 398 Lead Mings in the vicinity of Dublin 270 Limestone Cliffs near Plymouth, description of the, 103—formation of, in Shropshire, 199—varieties of, in the vicinity of Dub­ lin, 272—strata of, on the western side of the Malvern Hills, 306,309 Limestone, Transition, on the banks of the Plym 104 Limestone, schistose, near Launceston 122 Limestone, Coarse shelly (calcaire grossierj in Hampshire, Dorset­ shire, &c. 258 Limestone, oviform, in Dorsetshire 262 Lipari Islands, Native Concrete Boracic Acid, from the 389 MACCULLOCH, JOHN, M.D. Account of Guernsey, and the other Channel Islands 1 Notice accompanying a Section of Heligoland 322 Madeira, Sketch of the Geology of, by the Hon. H. G. Bennett 391 Malvern Hills, on the Mineralogy of, by Mr. Horner 281 Manganese found in Jersey 22 Manganese, Hack oxide of, Mine at Upton Pyn-e 101 Manganese, grey ore of, with brown iron-stone and brown iron-ore, in the peninsula of Howth, near Dublin 273 MARCET, ALEXANDER, M.D. Chemical Account of an Aluminous Chalybeate Spring in the Isle of Wight 213 Marl Beds in the Cheshire plain 40 Marl in Hampshire 255 Meres or deep Pools, characteristic of the old red sandstone for. mation 193 Mica Slate of Cornwall 1 go, 3« 418 INDEX. FAGB Mineral Beds, Observations on 157 Mineral Veins, Observations on 158 Mineral Beds and Veins, on the comparative age of 160 Mines of Cornwall, General Observations on the 156 — Estimate of the number of, of the different kinds of ore they contain, and of their relative ages 167 Mineral Deposits in Cornwall and Devonshire, of the different matrices accompanying the 175 Montserrat, Dr.